I don’t have an answer for you, but if you can be more specific on what year/model trailer and boat, you might get a response.
Did you try asking your question on PlanetNautique? The guy that runs it might know if Ramlin ever had a multi purpose trailer that covered both models.
Also, that’s a wide range of years your looking at, and in that time span the wetted surface of the 196 hull has changed multiple times, which could change how the bunks are laid out.
the bigger challenge with putting a 196 on a 206 trailer or vice versa is getting it properly centered from a weight distribution perspective, and making sure the propeller doesn’t hit the front of the prop cage by being too far forward.
I personally always put a trailer under my Nautiques that are designed for them. When I bought a used 2006 196 SN awhile ago, it didn’t have a trailer, so I had a new one built for it.
how do you plan on using it?